diff --git a/include/linux/rio_drv.h b/include/linux/rio_drv.h
index 31ad146..b75c059 100644
--- a/include/linux/rio_drv.h
+++ b/include/linux/rio_drv.h
@@ -365,6 +365,11 @@
 int rio_request_region(struct rio_dev *, int, char *);
 void rio_release_region(struct rio_dev *, int);
 
+/* Memory mapping functions */
+extern int rio_map_inb_region(struct rio_mport *mport, dma_addr_t local,
+			u64 rbase, u32 size, u32 rflags);
+extern void rio_unmap_inb_region(struct rio_mport *mport, dma_addr_t lstart);
+
 /* Port-Write management */
 extern int rio_request_inb_pwrite(struct rio_dev *,
 			int (*)(struct rio_dev *, union rio_pw_msg*, int));